<template>
    <div>
        <div ref="refChart" style="width: 100%;height:12.5rem;"></div>
    </div>
</template>
  
<script setup lang="ts">
import { RequestStatisticGetCarByOrigin } from "@/api/path/index.js";
import {onUnmounted, onMounted, ref} from 'vue';
import * as echarts from 'echarts';
type EChartsOption = echarts.EChartsOption;
const refChart = ref();
const chartInstance = ref();
const chartData = ref([]);
// 获取接口数据
const getData = () => {
  return new Promise((resolve, reject) => {
    RequestStatisticGetCarByOrigin()
      .then((res: any) => {
        chartData.value = res.resultObj;
        resolve(res.resultObj);
      })
      .catch((err: any) => {
        reject(err);
      });
  });
};
onMounted(async () => {
  await getData();
  // 图表初始化
  initChart();
  // 调用Echarts图表自适应方法
  screenAdapter();
  // Echarts图表自适应
  window.addEventListener('resize', screenAdapter);
});

const initChart = () => {
  chartInstance.value = echarts.init(refChart.value);
  const initOption: EChartsOption ={
    tooltip: {
      trigger: 'item'
    },
    legend: {
      orient: 'vertical',
      right: '3.125rem    ',
      top: 'center'
    },
    color: ['#017efa', '#b1cbfe', '#51cbff', '#b6e9ff'],
    series: [
      {
        name: 'Access From',
        type: 'pie',
        radius: '50%',
        center: ['40%', '50%'],
        label: {
          show: false,
          position: 'center'
        },
        emphasis: {
          label: {
            show: true,
            fontSize: 16,
            fontWeight: 'bold'
          }
        },
        labelLine: {
          show: false
        },
        data: chartData.value['今日']
      }
    ]
  };
  // 图表初始化配置
  chartInstance.value?.setOption(initOption);
};
const screenAdapter = () => {
  // 手动的调用图表对象的resize 才能产生效果
  chartInstance.value.resize({width:'auto', animation: { duration: 300 } });
};
onUnmounted(() => {
  // 销毁Echarts图表
  chartInstance.value.dispose();
  chartInstance.value = null;
  // Echarts图表自适应销毁
  window.removeEventListener('resize', screenAdapter);
});
</script>
<style lang="scss" scoped></style>